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Targeting nanoplastic and microplastic removal in treated wastewater with a simple indicator
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Researchers established a reliable method to predict how well wastewater treatment plants remove nanoplastics by correlating their removal with total suspended solids, a standard easy-to-measure metric. The study estimates current treatment plants remove only 39–69% of nanoplastics, meaning a substantial fraction escapes into rivers and drinking water sources.
With growing concerns over plastic accumulation in the environment, it is imperative to quantify nanoplastic and microplastic release to water bodies via water treatment plant effluent streams. Current methodological limitations present a major challenge for continuous monitoring of nanosized pollutants in effluent streams. In this work, a novel correlation was established between removal of nanoplastics and total suspended solids (TSS) during aggregation-based wastewater treatment. The established correlation successfully predicted nanoplastic removal for a wide range of relevant nanoplastic properties, including polymer type, size, surface functionalization and ageing history, under 41 different physico-chemical and activated sludge treatment conditions (R2 = 0.92; n = 117). The results of our correlation reveal a predicted nanoplastic removal between 39% and 69% for typical water treatment effluent streams governed by current TSS regulations in North America. The study also reveals the potential of using TSS as a simple metric to estimate microfibre, microsphere and microfragment removal. Although it is widely acknowledged that nanoplastic and microplastic contaminants are omnipresent in the environment, the role of water treatment plants in the fate of these contaminants is unclear. Correlating nanoplastic removal with total suspended solids removal in water is shown to be a reliable method for predicting how much nanoplastic can be removed by wastewater treatment plants.
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Quantitative analysis of microplastics in wastewater during selected treatment processes
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Wastewater treatment plants remove most microplastics (tiny plastic bits smaller than a grain of rice) from sewage before releasing water back into rivers and streams, catching over 90% of plastic fibers and beads, but they're much worse at filtering out plastic foil fragments, removing less than half. This matters because the plastic particles that slip through end up in the waterways that supply our drinking water and ecosystems, meaning even well-functioning treatment plants aren't a complete solution to keeping microplastics out of the environment (and ultimately, our bodies).
Microplastic and Nanoplastic Removal Efficiency with Current and Innovative Water Technologies
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Researchers compared conventional and innovative water treatment technologies for their effectiveness at removing microplastics and nanoplastics from drinking and wastewater. The review identifies critical gaps in current infrastructure and highlights advanced filtration and coagulation approaches that show the greatest removal efficiency.
Navigating Microplastic Challenges: Separation and Detection Strategies in Wastewater Treatment
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This review analyzes the separation and detection strategies used within wastewater treatment plants to address microplastic pollution, highlighting the technical limitations that allow substantial amounts of microplastics to pass through into receiving water bodies. Because wastewater treatment plants are the last line of defense before microplastics enter rivers, lakes, and ultimately drinking water, improving their removal efficiency is directly linked to reducing human microplastic exposure.
Detection of Microplastic in Wastewater Treatment Plants
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Researchers investigated microplastic detection methods in wastewater treatment plants, finding that while these facilities capture a significant fraction of microplastics, they also concentrate and potentially redistribute particles and co-contaminants into aquatic environments through effluent and biosolids.
Evaluation of Microplastic Removal Efficiency in Wastewater Treatment Plants
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Researchers evaluate the effectiveness of wastewater treatment plants at removing microplastics from water, assessing how rising plastic production is driving increased microplastic concentrations in aquatic ecosystems and the limitations of current treatment infrastructure in addressing this persistent hazard.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.